add support for array-data in content

Api/Data/NodeInterface.php

@@ -82,7 +82,7 @@ public function getContent();
     /**
      * Set content
      *
-     * @param string $content
+     * @param string|array $content
      * @return $this
      */
     public function setContent($content);

Model/Menu/Node.php

@@ -7,6 +7,7 @@
 use Magento\Framework\Model\Context;
 use Magento\Framework\Model\ResourceModel\AbstractResource as AbstractResource;
 use Magento\Framework\Registry;
+use Magento\Framework\Serialize\Serializer\Json;
 use Magento\Framework\Serialize\SerializerInterface;
 use Snowdog\Menu\Api\Data\NodeInterface;
 
@@ -97,14 +98,24 @@ public function setType($type)
      */
     public function getContent()
     {
-        return $this->_getData(NodeInterface::CONTENT);
+        $content =  $this->_getData(NodeInterface::CONTENT);
+
+        if (strpos($content, '{') === 0 && strpos($content, '}') === strlen($content) - 1) {
+            $content = $this->serializer->unserialize($content) ?: $content;
+        }
+
+        return $content;
     }
 
     /**
      * @inheritdoc
      */
     public function setContent($content)
     {
+        if (is_array($content)) {
+            $content = $this->serializer->serialize($content);
+        }
+
         return $this->setData(NodeInterface::CONTENT, $content);
     }